Friction shell and spring cage for draft gears



Sgm, mw gm L F. @'@QNNQH FRICTION SHELL ANDYISPRING CAGE FOR DRAFT GEMS Filed Dec. 14. 1922 F1191/ if 7" To all whom t may concern.'

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Application leddecember 14, 1922-.; Serial No.,6.0$,928.

Be it known that I, Jer-iN F. OCoNNon, a citizen of the TJnitedStates, residing at Chicago, in the county of Cook and State of Illinois, have invented 'a certain new and useful Improvement in Friction Shells and Spring Cages for VDraft Gears, of which the following-.is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming apart of this specification.

This invention relates to improvements in friction shell and spring cage for draft Sears. u The object of the invention is to provide economical and simple arrangement for attaching a friction shell to a spring cage whereby the connection is made rigid and durable and so disposed as to avoid any inI rence with any of the interior elements of the draft gear and without'curtailing any of the space forthe interior parts.

ln the drawing forming a part of this specification, Figure 1 is a part longitudinal central section, partl elevational view of a friction draft gearr showing my. improvements`` in connection therewith. Fig. 2 is a fiont end elevational view of the draft gear shown in Fig. 1;* And Fig. 3 isV a broken transverse sectional view correspondving to the section line 3 3 of Fig'. 1.

ln said drawing, the friction shell proper. is indicated by the reference character A and the spring cage bythe reference character B. rEhe broad arrangement of shell and cage corresponds to a well known type of frictien draft gear and more particularly one of that general class employing twin spring resistances. v

The spring cage proper B, as shown, is of rectangular cross-section having top and bottom walls 10-10, krear wall 11 and a front wall 12, the latter having a' circular opening 13 therein, centrallyA located to accommodate the inner end of the shell proper A. The sides of the cage B are open for the greater portion of their length in order to permit of the ins sertion and removal of the twin coil spring resistances 111-14 and the twin spring follower 15. it beingk understood that the springsv 14 are arranged side by side, as indicated in Figures 1 and 3. The front wall 12 of the E, being apertured as above described,

provides, in effect, Opposed inwardly eXtending flanges 16-2-16 overwhicli are adapted to be superimposed.corresponding diametricallyV opposed lateral flanges 17-17 formed f l integral with the shell A.

The shell proper A, for the mainpart, is,

of cylindrical forni to provide an interior cylindrical friction surface 18, the cylindrical portion being extended inwardly beyond the anges 17 as indicated at 19-19, said inward extension fitting within the opening 13 provided in the front end of the cage B. The twin spring follower is of more or less rectangular outline but curved at the four corners thereof as indicated'at 20-20 in Fig. 3. Said follower 15 is left'of sufficient area to overlie almost, but not quite, the entire ends of vthe two springs 111.

Said follower 15 is adapted to move within I wedge 22; three friction shoes 23 arranged in a circular series and-a preliminary spring 24: interposed between the follower 15V and interior shoulderson the shoes 23.

To rigidly unitethe shell and cage, I employ the following means.V In each corner of the assembled device, I employ a bolt v v25V having the'head end thereof disposed' within the cage yB and seated or `counter- Vsunk ina recess 26 in the correspondingwall of thecage, as best shown in Fig. 3,"it

being observed that thehead of the bolt 'is not only heldagainst turning, but is clear of the corresponding adjacent curved corner 2G of the follower 15 so that said fol? lower 15 may assume its normal position and without taking away vany of the usual space for the follower or springs. The shank of each bolt 25 is extended through the over- A lapping flanges ofthe cage and shell and to the outer end of each bolt is` applied a nut 27. p A turning by a lock plate 28, which is recessed tolfit over the nuts of each pair,.each plate 28 being in turn held against loss by a centrally disposed relatively light rivet 29, the inner ends of the rivets 29 being seated within suitable Arecesses 3() formed on the inner faces of the flanges'fiso that the said Each pair of nuts 27 is held against ice ends of said rivets Will not interfere with the normal? position of the'fspring follower. While the employment of the rivets 29 may be said, technically, to constitute permanent Vfastenirngs, nevertheless, they willk be', in ace tual practice, made so light that they may easily be chipped off` and replaced When it isdesired to renew the friction shellv or the spring cage,'it being observed that the rivets 29 are not subject to any appreciable tension, their sole function being. to; hold? the lock. plates '28 in position. Y

lilith the arrangement shownl and described, l obtain a very rigidfand strong connection between the shell and cage,y and one Which is ivell adapted to withstandl the forces which .tend to separate; the shell .and

cage vduring the release action of the-mechanism. With my arrangement, shouldl the shell Wear out or become broken or the cage y become injured inservice either part may he readily, replaced by another one, at? a in inimnin cost.v

lhave herein: shown Vandf described what l. norvconsider the .Lirefer-redmanner ol" l thereof; a spring cage having flanges at one' end'thereof and over which the shellflanges are adapted to he; securing bolts extendingv throughV the flanges and having the endsY on the inner sidesoffthe cage flanges recessed ther svithin; and lock plates'cooperable with rthe outer ends of said bolts.

2. ln eoinbination' ayspringcage ofi rectangular cross-section having opposed inwardly extending flanges at one end thereof; tivin arranged'springs Within said cage.; a twin spring follower disposed be tiveen said flanges and the adjacent ends of the springs; a friction shell'E having flanges at its innerv end overlying Vsaid flanges of the cage; kand fastening elements extended through the flanges of the shell and cage, said fastening devices being disposed atv the corners of the cage and outside of the periphery of said follower.

3. Incoinbination.: a spring cage having an end Wall with a circular opening therein,

said Wall providing flanges at opposite sides thereof; ai cylindrical friction shell hava' portion thereof extending` Within said openinot and' provided ywith laterally Vex-r tendedA flanges overlying said flangesl of the cage; and fonr'fast'c'ning elements extending through the flanges ofl the' shell and cage' and each located in a corner of the cage. l

4e. In combination: a spring cage havingv an endivall Wit-ha circular opening therein,

said wall providing flanges atopp'osite sidesA thereof; a cylindrical frictionA shell having a portion thereof' entending Within said" opening and provided with laterally extended flanges overlying saidl flanges" of VVthe cage, tour fastening elements extending. throi'igh-the flanges ofthe shell and cage and each located in a corner of the cage,v each of said fastening devices-.comprising a' bolt inv-ing the head end thereof vseated vWithin a recess on the interior of the cage and a init on the outer face of the shell; flange; a lock` plate cooperalole' With each pair of nuts,` said lock platesv being' disposed on the outer face of the shell'flanges";and inea-ns for holding said lock plates in place.V

ln witness that l claiinfthe foregoing l llavek hereunto subscribed my nanietliis'l lay of October, 1922. Y Y

JOHN F; OCONNOR lV-itnesses L:

kl-l. M. DEAMER,

Finances. SAVAGE. 

